package com.sgj.controller.admin;

import com.sgj.pojo.Tag;
import com.sgj.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;
import java.util.Objects;

/**
 * @author 沈国纪
 * @date 2021/3/31 9:11
 */
@Controller
@RequestMapping("/admin")
public class TagController {

	private static final String TAGS_INPUT = "admin/tags-input";
	private static final String TAGS = "admin/tags";
	private static final String REDIRECT_TAGS = "redirect:/admin/tags";

	@Autowired
	private TagService tagService;

	/**
	 * 分页查询
	 * @param pageable
	 * @param model
	 * @return
	 */
	@GetMapping("/tags")
	public String tags(@PageableDefault(size = 10, sort = {"id"}, direction = Sort.Direction.DESC) Pageable pageable,
	                   Model model) {
		model.addAttribute("page", tagService.listTag(pageable));
		return TAGS;
	}

	/**
	 * 插入标签页面跳转
	 * @param model
	 * @return
	 */
	@GetMapping("/tags/input")
	public String input(Model model) {
		model.addAttribute("tag", new Tag());
		return TAGS_INPUT;
	}

	/**
	 * 新增分类页面跳转
	 * @param id
	 * @param model
	 * @return
	 */
	@GetMapping("/tags/{id}/input")
	public String editInput(@PathVariable Long id, Model model) {
		model.addAttribute("tag", tagService.getTag(id));
		return TAGS_INPUT;
	}

	/**
	 * 新增标签
	 * @param tag
	 * @param result
	 * @param attributes
	 * @return
	 */
	@PostMapping("/tags")
	public String post(@Valid Tag tag, BindingResult result, RedirectAttributes attributes) {
		Tag tag1 = tagService.getTagByName(tag.getName());
		if (tag1 != null) {
			result.rejectValue("name", "nameError", "不能添加重复的标签");
		}
		if (result.hasErrors()) {
			return TAGS_INPUT;
		}
		Tag t = tagService.saveTag(tag);
		if (Objects.isNull(t)) {
			attributes.addFlashAttribute("message", "新增失败");
		} else {
			attributes.addFlashAttribute("message", "新增成功");
		}
		return REDIRECT_TAGS;
	}


	/**
	 * 更新标签
	 * @param tag
	 * @param result
	 * @param id
	 * @param attributes
	 * @return
	 */
	@PostMapping("/tags/{id}")
	public String editPost(@Valid Tag tag, BindingResult result, @PathVariable Long id, RedirectAttributes attributes) {
		Tag tag1 = tagService.getTagByName(tag.getName());
		if (tag1 != null) {
			result.rejectValue("name", "nameError", "不能添加重复的标签");
		}
		if (result.hasErrors()) {
			return TAGS_INPUT;
		}
		Tag t = tagService.updateTag(id, tag);
		if (Objects.isNull(t)) {
			attributes.addFlashAttribute("message", "更新失败");
		} else {
			attributes.addFlashAttribute("message", "更新成功");
		}
		return REDIRECT_TAGS;
	}

	/**
	 * 删除标签
	 * @param id
	 * @param attributes
	 * @return
	 */
	@GetMapping("/tags/{id}/delete")
	public String delete(@PathVariable Long id, RedirectAttributes attributes) {
		tagService.deleteTag(id);
		attributes.addFlashAttribute("message", "删除成功");
		return REDIRECT_TAGS;
	}
}
